78977918208 has 144 divisors (see below), whose sum is σ = 246084322176. Its totient is φ = 22014689280.

The previous prime is 78977918183. The next prime is 78977918219. The reversal of 78977918208 is 80281977987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41260 + ... + 399572.

It is an arithmetic number, because the mean of its divisors is an integer number (1708918904).

Almost surely, 2^78977918208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78977918208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123042161088).

78977918208 is an abundant number, since it is smaller than the sum of its proper divisors (167106403968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78977918208 is a wasteful number, since it uses less digits than its factorization.

78977918208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358380 (or 358366 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 66.

The spelling of 78977918208 in words is "seventy-eight billion, nine hundred seventy-seven million, nine hundred eighteen thousand, two hundred eight".